Dennis Quaid's third wife, Kimberly Buffington-Quaid, has filed for divorce after almost eight years of marriage.

Buffington-Quaid, a real-estate agent from Texas, says in the court papers that their relationship has "become insupportable because of discord or conflict of personalities," according to Extra.

Quaid and his wife married in July of 2004 and have 4-year-old twins, Thomas Boone and Zoe Grace. A spokesperson for Quaid confirmed the filing in a statenent obtained by OnTheRedCarpet.com, adding: "A satisfactory settlement is being worked out for both parties."

There is also a temporary custody order in place, which indicates that the couple will share custody of the twins. According to Extra, Buffington-Quaid has been granted possession of the family's main house and a Mercedes, while Quaid will retain a condo and a Cadillac. The couple will share a Range Rover.

Quaid was previously married to actress P.J. Soles for five years, starting in 1978. He and Meg Ryan were married for 10 years, beginning in 1991, and have a 19-year-old son, Jack.

The actor and Buffinton-Quaid welcomed their twins via a surrogate in 2007. The babies were put in intensive care after suffering an accidental overdose of the blood-thinner Heparin. Quaid later sued its manufacturer. The case made international headlines.

Quaid is known for a slew of films, such as "Frequency," "The Day After Tomorrow," "Vantage Point," "The Rookie," "Soul Surfer" and the 2011 reboot of "Footloose."